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#include "window.h"
#include <SDL2/SDL.h>
#include "buffer.h"
#include "editor.h"
#include "font.h"
static SDL_Window *window = NULL;
static SDL_Renderer *renderer = NULL;
static SDL_Texture *font_texture = NULL;
static BDFFontInfo font;
void window_init()
{
/* TODO: There should be a 'panic' method of sorts to be reused here. */
if (SDL_Init(SDL_INIT_VIDEO) != 0) {
fprintf(stderr, "Failed to initalize SDL: %s\n", SDL_GetError());
return;
}
window = SDL_CreateWindow("Bitmap font test", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
640, 480, SDL_WINDOW_SHOWN);
if (window == NULL) {
fprintf(stderr, "Failed to create a window: %s\n", SDL_GetError());
return;
}
renderer = SDL_CreateRenderer(window, -1, 0);
if (renderer == NULL) {
fprintf(stderr, "Failed to create a renderer: %s\n", SDL_GetError());
return;
}
font = font_load("ter-u12n.bdf");
font_texture = font_create_texture(renderer, &font);
SDL_ShowWindow(window);
}
int window_handle_event()
{
static SDL_Event e;
SDL_WaitEvent(&e);
switch (e.type) {
case SDL_QUIT:
return 0;
}
return 1;
}
static void draw_font_text(struct append_buffer *buffer)
{
SDL_Rect dstrect = { 0, 0, 0, 0 };
for (int i = 0; i < buffer->length; i++) {
const char letter = buffer->buffer[i];
if (letter > 128) {
printf("TODO: Non-ASCII characters are not currently supported.\n");
continue;
}
const int char_index = font.char_index_for_code_point[letter];
BDFFontChar *glyph = &font.chars[char_index];
if (glyph == NULL) {
fprintf(stderr, "Font doesn't have character %c", letter);
continue;
}
dstrect.w = glyph->bounds.w;
dstrect.h = glyph->bounds.h;
SDL_RenderCopy(renderer, font_texture, &glyph->bounds, &dstrect);
if (letter == '\n') {
dstrect.x = 0;
dstrect.y += font.bounds.h;
} else {
dstrect.x += glyph->next_glyph_offset.x;
dstrect.y += glyph->next_glyph_offset.y;
}
}
}
void window_redraw(struct editor_state *editor)
{
SDL_RenderClear(renderer);
editor_scroll(editor);
struct append_buffer buffer = ABUF_INIT;
editor_draw_rows(editor, &buffer);
editor_draw_status_bar(editor, &buffer);
editor_draw_message_bar(editor, &buffer);
draw_font_text(&buffer);
SDL_RenderPresent(renderer);
SDL_UpdateWindowSurface(window);
}
void window_destroy()
{
font_destroy(&font);
SDL_DestroyTexture(font_texture);
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
}
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